Kill each other...for science! The class of '89 is trapped in an elite school killing game. Investigate, solve, and expose your classmates in Kumitantei™: Old-School Slaughter, an episodic murder-mystery ADV card-battler inspired by retro anime.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.29/day in the week to Sep 4 → 0.86/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Kumitantei™: Old-School Slaughter is an episodic murder-mystery ADV cardbattler that lovingly fuses retro anime analog horror with killing game! Kumitantei will consist of 6 episodes, beginning to release in early 2026.
"The Empire of Japan, 1989... Awoken in a decaying old bunker, sixteen elite Absolute Students are trapped in a kill-or-be-killed Apathy Experiment. Will they band together to uncover secrets of this anemoic alternate past, or lose their humanity and lives in the present?"
With a visual style inspired by Rumiko Takahashi’s Urusei Yatsura and '80s anime alongside classic Japanese mystery-adventure games like Danganronpa and Ace Attorney, Kumitantei™ thrusts you into a suspenseful character-driven killing game narrative where your deckbuilding and detective skills are the only keys to surviving. It's a creepy-cute love letter to decades of ADVs that wears its many inspirations on its sleeve: perfect for fans of visual novels, detective games, and deckbuilders with deep narratives.
Bond with your classmates! Get to know the Absolute Class of '89 by listening to them, giving them gifts, and receiving powerful cards to use during debates!
Investigate grisly murders! Use your detective skills to comb through slain classmates’ crime scenes and take your evidence to trial!
Survive the trial! Cut through the lies and prove your case. Inspired by Ace Attorney and the cult classic Danganronpa series, Clinical Trials can only end in bloodshed, whether it's the culprit's or everyone else's!
Build your deck! Create absolute combos using cards you find in the Bunker and through bonding with your classmates to dominate the debates and trials!
Please insert coin! Test your retro gaming skills in a variety of faithfully crafted anemoic riffs on true old-school arcade icons!
Add-ons
Each DLC is estimated with the same model as a game, then summed — a modeled figure, not reported DLC sales.
Sums Steam only; GOG, Epic publish no volume signal, so the true total is higher by an unknown amount.
| Store | Price | Audience | Score | Chart | Est. revenue |
|---|---|---|---|---|---|
SteamYou are here | $14.99 | 366reviews | 92% | — | $127.1K |
| $11.99−20% | 4ratings | 86% | — | not modelled | |
Engagement
Reviews
Themes across 85 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
This game is incredible from the first second. The phenomenal voice acting, retro arcade aesthetic (and some gameplay even!), and compelling mysteries weave together a beautifully tragic tapestry. The light-hearted moments keep it from getting too depressing, but be warned it will stir some emotions up in you. The protagonist actually has a personality, which I love! Genuinely there isn't a single character I'm not attached to in some form. I love the first foray into this game and can't wait for episode 2! Congratulations, Mango Factory!
sweet
Media
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Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, Spanish - Spain, Japanese, Simplified Chinese*languages with full audio support
| $14.99 |
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| not modelled |
Matched by title — a reused name can pair the wrong games. * is a critic aggregate. Prices and positions are each store's United States storefront; Epic charts worldwide. Audience and Score too, except Steam's, which is worldwide.
Hours played at review time, across 85 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
After 9 total hours completing through the first chapter of the game i must say, i was quite impressed! i have played all three main danganronpa games, and seen the anime (on xbox only so sadly not on steam) and this was an extremely faithful, yet unique perception of the killing game genre i have grown to love! the only glaring issues i ever had with the game were very personal, things such as...some of the art being less than consistant at times, to the dialogue and likes and dislikes of some of the characters being extremely outlandish at times and overall becoming minor annoyances around the 5 hour mark. HOWEVER. i think that if you are looking for a new danganronpa experience with new mechanics, silly references to the series, and an honestly very diverse cast. i would HIGHLY recommend getting this game. i am incredibly excited for future chapters, and cannot wait to see what plots the game has to offer.
Words cannot describe how impressed I am with Kumitantei OSS, but I still want to give it my best shot! In spite of its obvious influences, it takes existing formulas and makes them so fresh and interesting, but the best part of it all is its additions to that existing foundations. The card battling is such a natural fit into a killing game mystery visual novel, elevating and making tense moments even more so! The cast is INCREDIBLE, lovingly enhancing fun tropes and adding more to them as it did with the gameplay concepts before hand. Hats off to the voice actors as well for really fun performances, Shigure Moichi and Himari REALLY knocked it out of the park! But my absolute favorite part is a major spoiler, [spoiler] throughout the episode you're slowly fed horrific news segments and old tv interviews, introducing a VERY unsettling horror subplot that I cannot wait to see explored in episode 2. [/spoiler] If you are a fan of the obvious inspirations there is absolutely no reason to not give Kumitantei a chance. So hyped for episode 2.
so peak! way better than danganronpa, they censor the slurs in this one! but also the way you find out about the killer was so good :D 9/10
Having played episode 1 to completion I can wholeheartedly recommend to anyone even moderately interested in detective/Murder mystery games. The cast are all endearing and unique with strong personalities that clash in interesting ways. Gameplay is solid and just as, if not more, engaging than its contemporaries with an intriguing plot that I'm eager to see developed over time
I liked it, FIND IT, I wish it was a lil more different from danganronpa but what is here is a good start with cool cutscenes
Having a great time so far! Glad to see there's a solid amount of voice acting involved (can't wait for the day these games are 100% voice acted) and a great spread of absolutes. My favourite so far is the Bee absolute and the Meteorologist (due to their secret relationship with the Prosecutor). Can't wait for more episodes!
Du grand Ganganrompa, bien qu'il n'ont pas officiellement la licence non seulement il respect mais sublime la trilogy initial et la formule des Ganganrompa que nous aimons tant. Un pur bonheur à jouer
This Game is an amazing addition to the Danganronpa formula style of game, With such intriguing characters, amazing voice acting and beautifully drawn art style/animations I have incredibly high hopes for this game. The main theme of apathy is a very interesting concept to explore as it's not always black and white but a spectrum of emotions (or lack thereof I should say). I can't wait for the rest of the episodes to come out, again I cannot reiterate this enough but I have incredibly high hopes for this game.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
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